<template>
  <div class="user">
   <header-bar :text="title" :left="left"></header-bar>
<div>
    <div class="txphoto">
      <span>头像</span>
      <div class="user_photo">
        <div class="userphoto_box">
          <div class="cert_show">  
          <div v-if="pageInfo.userinfo.photos" class="cert_picture" :style="'backgroundImage:url('+headerImage+')'"></div>  
          <img class="cert_picture" v-else src="../assets/header.png" alt="">
           <!-- <img v-if="pageInfo.userinfo.photos" :src="pageInfo.userinfo.photos" alt="">
              <img src="../assets/header.png" alt=""> -->
        </div>  
        <div class="cert_file">  
          <input type="file" id="upload" accept="image/*" @change="upload">
        </div> 
        </div>
        <i class="iconfont icon-you"></i> 
      </div>
    </div>
    <div class="user_nick">
      <span>昵称</span>
      <div @click="changename()">
        <span>{{name}}</span>
        <i class="iconfont icon-you"></i> 
      </div>
    </div>
    <div class="user_phone">
      <span>手机号</span>
      <div>
        <span>{{getPhone}}</span>
      </div>
    </div>
  </div>
      <mt-popup
      v-model="namepopupVisible">
      <div class="changenamebox">
        <mt-field placeholder="请输入昵称" v-model="username" :attr="{ maxlength: 6 }"></mt-field>
        <div class="changenamebtn">
          <button class="closeChangeNamebox" @click="closeChangeNamebox()">取消</button>
        <button class="postChangeNamebox" @click="postChangeName(username)">提交</button>
        </div>
      </div>
    </mt-popup>
    <cutting ref="cutting" :imgUrl="resUrl" @cutSuccess="cutSuccess"></cutting>
  </div>
</template>
<script>
import { Header, Toast } from "mint-ui";
import headerBar from "./main/header";
import { mapState, mapGetters, mapMutations, mapActions } from "vuex";
import Exif from "exif-js";
import util from "../assets/js/util.js";
import { editUserPhotos, userInfo, editUserInfo } from "../api/api.js";
import qs from "qs";
import cutting from './main/cutting'
export default {
  name: "User",
  data() {
    return {
      msg: "",
      headerImage: "",
      picValue: "",
      user: "",
      username: "",
      name: "",
      mobilephone: "",
      namepopupVisible: false,
      title: "个人信息",
      resUrl:"",
      left: {
        status: true
      }
    };
  },
  computed: {
    ...mapState(["pageInfo"]),
     getPhone(){
      return util.getPhone(this.pageInfo.userinfo.mobilephone)
    }
  },
  components: {
    headerBar,
    cutting
  },
  methods: {
    cutSuccess(url){
          var that = this;
          this.headerImage = url;
           this.postImg();
      },
    upload(e) {
      let files = e.target.files || e.dataTransfer.files;
      if (!files.length) return;
      this.picValue = files[0];
      this.imgPreview(this.picValue);
    },
    imgPreview(file) {
      let self = this;
      let Orientation;
      //去获取拍照时的信息，解决拍出来的照片旋转问题
      Exif.getData(file, function() {
        Orientation = Exif.getTag(this, "Orientation");
      });
      // 看支持不支持FileReader
      if (!file || !window.FileReader) return;

      if (/^image/.test(file.type)) {
        // 创建一个reader
        let reader = new FileReader();
        // 将图片2将转成 base64 格式
        reader.readAsDataURL(file);
        // 读取成功后的回调
        reader.onloadend = function() {
          let result = this.result;
          let img = new Image();
          img.src = result;
          //判断图片是否大于100K,是就直接上传，反之压缩图片
          if (this.result.length <= 100 * 1024) {
            
            // self.headerImage = this.result;
            self.resUrl = this.result;
            self.$refs.cutting.showStatus = true;
          } else {
            img.onload = function() {
              
              let data = self.compress(img, Orientation);
              // self.headerImage = data;
              self.resUrl = data;
              self.$refs.cutting.showStatus = true;
            };
          }
        };
      }
    },
    postImg() {
      let para = {
        id: this.pageInfo.userinfo.id,
        files: this.headerImage
      };
      this.$ajaxPost("userPhotos", para).then(res => {
        if (res.code == 200) {
          this.initUserinfo();
        }
        Toast({
          message: res.msg,
          position: "bottom",
          duration: 5000
        });
      });
    },
    rotateImg(img, direction, canvas) {
      //最小与最大旋转方向，图片旋转4次后回到原方向
      const min_step = 0;
      const max_step = 3;
      if (img == null) return;
      //img的高度和宽度不能在img元素隐藏后获取，否则会出错
      let height = img.height;
      let width = img.width;
      let step = 2;
      if (step == null) {
        step = min_step;
      }
      if (direction == "right") {
        step++;
        //旋转到原位置，即超过最大值
        step > max_step && (step = min_step);
      } else {
        step--;
        step < min_step && (step = max_step);
      }
      //旋转角度以弧度值为参数
      let degree = step * 90 * Math.PI / 180;
      let ctx = canvas.getContext("2d");
      switch (step) {
        case 0:
          canvas.width = width;
          canvas.height = height;
          ctx.drawImage(img, 0, 0);
          break;
        case 1:
          canvas.width = height;
          canvas.height = width;
          ctx.rotate(degree);
          ctx.drawImage(img, 0, -height);
          break;
        case 2:
          canvas.width = width;
          canvas.height = height;
          ctx.rotate(degree);
          ctx.drawImage(img, -width, -height);
          break;
        case 3:
          canvas.width = height;
          canvas.height = width;
          ctx.rotate(degree);
          ctx.drawImage(img, -width, 0);
          break;
      }
    },
    compress(img, Orientation) {
      let canvas = document.createElement("canvas");
      let ctx = canvas.getContext("2d");
      //瓦片canvas
      let tCanvas = document.createElement("canvas");
      let tctx = tCanvas.getContext("2d");
      let initSize = img.src.length;
      let width = img.width;
      let height = img.height;
      //如果图片大于四百万像素，计算压缩比并将大小压至400万以下
      let ratio;
      if ((ratio = width * height / 4000000) > 1) {
        console.log("大于400万像素");
        ratio = Math.sqrt(ratio);
        width /= ratio;
        height /= ratio;
      } else {
        ratio = 1;
      }
      canvas.width = width;
      canvas.height = height;
      //        铺底色
      ctx.fillStyle = "#fff";
      ctx.fillRect(0, 0, canvas.width, canvas.height);
      //如果图片像素大于100万则使用瓦片绘制
      let count;
      if ((count = width * height / 1000000) > 1) {
        console.log("超过100W像素");
        count = ~~(Math.sqrt(count) + 1); //计算要分成多少块瓦片
        //            计算每块瓦片的宽和高
        let nw = ~~(width / count);
        let nh = ~~(height / count);
        tCanvas.width = nw;
        tCanvas.height = nh;
        for (let i = 0; i < count; i++) {
          for (let j = 0; j < count; j++) {
            tctx.drawImage(
              img,
              i * nw * ratio,
              j * nh * ratio,
              nw * ratio,
              nh * ratio,
              0,
              0,
              nw,
              nh
            );
            ctx.drawImage(tCanvas, i * nw, j * nh, nw, nh);
          }
        }
      } else {
        ctx.drawImage(img, 0, 0, width, height);
      }
      //修复ios上传图片的时候 被旋转的问题
      if (Orientation != "" && Orientation != 1) {
        switch (Orientation) {
          case 6: //需要顺时针（向左）90度旋转
            this.rotateImg(img, "left", canvas);
            break;
          case 8: //需要逆时针（向右）90度旋转
            this.rotateImg(img, "right", canvas);
            break;
          case 3: //需要180度旋转
            this.rotateImg(img, "right", canvas); //转两次
            this.rotateImg(img, "right", canvas);
            break;
        }
      }
      //进行最小压缩
      let ndata = canvas.toDataURL("image/jpeg", 0.1);
      tCanvas.width = tCanvas.height = canvas.width = canvas.height = 0;
      return ndata;
    },
    initUserinfo() {
      this.$ajaxGet("userInfo", {
        id: this.pageInfo.userinfo.id
      }).then(res => {
        this.pageInfo.userinfo = res.data;
        util.setLocalStorage(
          "userinfo",
          JSON.stringify(this.pageInfo.userinfo)
        );
      });
    },
    changename() {
      this.namepopupVisible = true;
    },
    closeChangeNamebox() {
      this.namepopupVisible = false;
    },
    postChangeName(a) {
      if (a) {
        let para = {
          id: this.pageInfo.userinfo.id,
          name: a
        };
        this.$ajaxPost("userInfo", para).then(res => {
          if (res.code == 200) {
            this.initUserinfo();
            this.closeChangeNamebox();
          }
          Toast({
            message: res.msg,
            position: "bottom",
            duration: 5000
          });
        });
      } else {
        Toast({
          message: "请先输入昵称",
          position: "bottom",
          duration: 5000
        });
      }
    }
  },
  mounted() {
    this.headerImage = this.pageInfo.userinfo.photos;
    this.name=this.pageInfo.userinfo.name;
    this.mobilephone=this.pageInfo.userinfo.mobilephone;
  }
};
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
@import url("../../static/css/user.css");
</style>
